Specifies the value to be used for empty points. This property determines how an empty point is treated when the chart is drawn.
Applicable chart types
Point, Bubble, Line, Spline, Step Line, Radar, Range, Spline Range, Polar, Area, Spline Area
Applicable chart elements
2D or 3D
If a value of Average is used, the chart is drawn as though a point exists, and has a value of the average of the two adjacent points. If Zero is used, the chart is drawn as though a point exists with a zero value.